Performance Specifications

Maximum Allowable Input [hp]:

32.00

Maximum Input Torque [in-lb]:

13166

Maximum Worm Speed at Rated Load [rpm]:

153

Maximum Load at 1750 RPM [lb]:

17330

More Details

A Upright Rotating Screw Jack has a lift shaft that moves a nut as it turns. The lift shaft is fixed to the worm gear. This causes the load, which is attached to the travel nut, to move along the lift shaft. A Upright Roating Screw jacks has the lift shaft extending out the top of the jack.

Technical Information

Technical Information

Motor Mounts/Brakes

Motor Mounts / Brake Motors

ActionJac™ Motor Mount assemblies are designed for standard motors and include jaw type couplings. These assemblies are available for the jack sizes listed in the table. Non-standard motor mounts can be designed for special requirements including, special couplings, small NEMA frame motors, DIN standard motors, stepper motor and servomotor designs. See page 186 of ourWorm Gear Screw Jacks Catalogfor Servo Jack motor mount examples, contact Nook Industries for additional information.

See charts for order codes and motor mount dimensions. Additional motor mounts can be custom manufactured for other jack sizes, please contact Nook Engineering.

CAUTION: Ball Screw Jacks are self-lowering. A brake of sufficient torque is required to hold the load with a ball screw jack. Be sure to verify that the brakemotor selected has sufficient brake torque for your application.

Manual

Jack Maintenance Manual

Column Strength

Column Strength - Inch

Column strength is the ability of the lift shaft to hold compressive loads without buckling. With longer screw lengths, column strength may be substantially lower than nominal jack capacity.

If the lift shaft is in tension only, the screw jack travel is limited by the available screw material or by the critical speed of the screw. Refer to the acme screw technical section for critical speed limitations. If there is any possibility for the lift shaft to go into compression, the application should be sized for sufficient column strength.

The chart below is used to determine the required jack size in applications where the lift shaft is loaded in compression.

To Use This Chart:

Find a point at which the maximum length "L" intersects the maximum load. Be sure the jack selected is above and to the right of that point.

CAUTION: Chart does not include a design factor.

The chart assumes proper jack alignment with no bending loads on the screw. Effects from side loading are not included in this chart. Jacks operating horizontally with long lift shafts can experience bending from the weight of the screw. Consult Nook Industries if side thrust is anticipated, operating horizontally, or maximum raise is greater than 30 times the screw diameter.

Available Lift Screw Lengths

As a major manufacturer of industrial lead screws, Nook Industries stocks a wide selection of acme screws. Nook Industries has the capacity to make long acme screws for special applications. Rotating screw jacks can be built with a larger diameter lift screw for greater column strength, or a different lead to change the jack operating speed.